Metric socket flat head, Zinc plated class 12.9 alloy steel
Socket flat head screw

Socket flat head diameter is measured on the outside of the threads.

Metric socket flat head diameter

Diameter and Thread pitch

4mm x 0.7mm 5mm x 0.8mm 6mm x 1.0mm 8mm x 1.25mm 10mm x 1.5mm 12mm x 1.75mm 16mm x 2.0mm